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Intro to Android Development

Intro to Android Development. Ben Lafreniere. Getting up and running. Don’t use the VM! http://developer.android.com/resources/tutorials/hello-world.html Steps: Install Eclipse Install the Android Development Tools (ADT) plugin Install the Android SDK (may be optional) Create an emulator

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Intro to Android Development

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  1. Intro to Android Development Ben Lafreniere

  2. Getting up and running • Don’t use the VM! • http://developer.android.com/resources/tutorials/hello-world.html • Steps: • Install Eclipse • Install the Android Development Tools (ADT) plugin • Install the Android SDK (may be optional) • Create an emulator • Hello world!

  3. Download and Install Eclipse • Eclipse has many versions! • Go with Eclipse Classic(32- or 64-bit depending on your system) • http://www.eclipse.org/downloads

  4. Install ADT plugin • http://developer.android.com/sdk/eclipse-adt.html#installing

  5. Download and Install the Android SDK • http://developer.android.com/sdk/index.html

  6. Use SDK Manager to install APIs • Why so many SDK versions? • Android is a UI toolkit being incrementally developed before our eyes • Install and use Android 2.3.3 SDK (API 10) • Because these are the phones we’ll be marking on

  7. Video walkthrough • anddev_installing.avi

  8. Creating an emulator • Not all developers have android devices • So we emulate one! • Video • anddev_create_emu.avi

  9. Developing with the Emulator • Emulator takes a long time to boot up • Enabling the ‘Snapshot’ option speeds things up by saving the emulator’s state when it’s closed, and restoring it when it’s started again • You can keep the emulatoropen between runs • Don’t develop on the VM!(the emulator will run way too slow)

  10. Android Programming

  11. Creating an Android project • http://developer.android.com/resources/tutorials/hello-world.html

  12. Hello World! • HelloAndroidActivity.java

  13. Android App Anatomy – Classes • Activity – A single screen of the application • View – The superclass for widgets(the UI is made up of a tree of View objects) • Intent – An action that must be performed

  14. Activities • A single, focused thing that the user can do • Should use an Activity for each screen of the application • Activities must be declared in the Manifest file

  15. Views • Superclass of all Android widgets(similar to java.awt.Component in Swing)

  16. Views • Superclass of all Android widgets(similar to the Component class from Swing)

  17. Intents • Abstract description of an action that the user wants to perform (e.g. open a webpage,share a picture) • Used to transition betweenActivities • Includes the intended action,and may include data

  18. Code Examples • HelloAndroid – One Activity, One TextView, very simple • FormExample – Two Activities, using an Intent to start a second Activity • DataPassExample – Builds on FormExample, using Intents to pass data between Activities

  19. Much more • Using XML layouts to separate presentation from logic • Using strings.xml in lieu of hard-coded strings • Saving the application’s state when an activity is paused

  20. Useful references • Android Developershttp://developer.android.com • Tutorials sectionhttp://developer.android.com/resources/browser.html?tag=tutorial • Notebook tutorial (detailed multi-Activity example)http://developer.android.com/resources/tutorials/notepad/index.html • Common taskshttp://developer.android.com/resources/faq/commontasks.html

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